Webasto burner unit Air Top 3500/5000 ST Petrol

Webasto burner unit 9004221A is an original combustion chamber for the petrol versions of the Air Top 3500 ST and Air Top 5000 ST parking heaters. In this burner unit, petrol is absorbed into the internal burner fleece, mixed with air, and then ignited to produce heat. Due to prolonged exposure to heat and combustion residues, the burner fleece can become contaminated or carbonized, leading to starting problems, smoke formation, and an unstable flame. Replacing the burner unit restores combustion and ensures reliable heater operation.

Main features and benefits:

Original Webasto part: OEM quality for a perfect fit and reliable performance.
Specifically for petrol heaters: Suitable for Air Top 3500 ST and Air Top 5000 ST petrol versions.
Efficient combustion: The internal burner fleece ensures optimal fuel distribution.
Resolves common malfunctions: Ideal for starting problems, smoke formation, and error codes.
Reliable heat output: Restores a stable flame and efficient operation of the parking heater.